Serious driveline problems

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  • e30Matt
    R3V Elite
    • Dec 2003
    • 5077
    #1

    Serious driveline problems

    I was leaving for class this morning, when, as I was engine braking behind a car going down a hill, I began to hear a grinding noise...

    I got back on the gas going up the next hill and the noise stopped. But every time I engine brake I get a slight vibration and a grinding noise, as if something were scraping against the driveshaft or the input/output flanges on the diff.

    Any insight? So far my inclination is to believe it's the diff mount or subframe bushings/nuts, judging by the way I get a slight thump when I start to engine brake.

    Help ASAP!

    "See, we're adding a little something to this month's sales contest. As you all know, first prize is a Cadillac Eldorado. Anyone wanna see second prize? Second prize is a set of steak knives. Third prize is you're fired."
    Tags: None
    • e30Matt
      R3V Elite
      • Dec 2003
      • 5077
      #2
      Found the culprit. Front two diff mounting bolts had vibrated loose.

      "See, we're adding a little something to this month's sales contest. As you all know, first prize is a Cadillac Eldorado. Anyone wanna see second prize? Second prize is a set of steak knives. Third prize is you're fired."

        Comment

        • MattE30
          E30 Mastermind
          • Oct 2003
          • 1520
          #3
          That happened to me and cracked my subframe where it mounts to the differential. Keep those bitches tight!

          97 Cosmos M3

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